IB courses vs IB diploma

ill be sure to check on this, thanks.
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in regards to the HL class, I’m currently in IB chem HL. I’m in 11th grade and since HL classes are two years long, I would have to do it in 12th grade as well in order to get credit for the IB diploma. i really hate chemistry and am struggling a lot, so I really don’t think it would be feasible for me to continue chem in 12th grade as well. i really fear my mental health and grades will suffer if I continue with chem.
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the other option is IB Biology HL (i originally wanted to take this class, but my parents forced me to take chem hl). I asked my counselor if I could switch to bio, but they said that since its already 7 weeks into school, its too late to switch. i honestly find this pretty unfair since these science courses are not 1-year-long courses, but instead 2. so ill have to either deal with chemistry for 2 years, or drop out of chem and not get the diploma. (my school only offers certain HL/SL courses, so taking a science HL course is the only way I can get the IB diploma)
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do you think there’s any way I can appeal to IB about this issue?
@tkoparent